The use of Au‐Cd alloys to achieve large Schottky barrier heights on CdTe

摘要

The Schottky barrier height of Cd, Au, and Au‐Cd alloys on vacuum cleaved surfaces ofn‐CdTe was determined byI‐V,C‐V, and photoresponse techniques. A large barrier of 0.92 eV was found in the case of the Au‐Cd alloy contacts. Contacts made with elemental Cd or Au gave barrier heights of 0.45 and 0.65 eV, respectively. The increased barrier height found on Au‐Cd alloy contacts may be related to recent UHV observations on Schottky barrier formation where crystal defects play a role in determining the observed barrier height.